Hun I would go with the anti fungal treatments first. I know the oxine is expensive but you will have a gallon for years.
Try some vites and electrolytes in her water. Make a mash with a small amount of garlic, oregano (or italian spices), a small amt of live yogurt, scrambled egg, and small amt of ginger root, and some of her food. She will love it. Put some Apple Cider Vinegar with the Mother in her water too. And when you have the money I would get some Oxine.
I actually have done the mixture of those foods and she gets sav-a-chick every couple days. Also have done the apple cider vinegar, but i'm glad you mentioned ginger root! I have been trying to find if it was safe. I returned the tylan and ordered the cheapest oxine I could find. I only ordered a quart size, it was $21.00 with shipping which isn't terrible. Just ahve to budget for the rest of the week haha.
Where did you get it at that price? I am running low and I like to put it in my incubator too. I just use 7 drops per gallon of water and then use that water in my incubator. Thanks